package demo20241016;

import java.util.Scanner;

public class Text {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            String str = in.nextLine();
            String[] arr = str.split(" ");
            StringBuilder sb = new StringBuilder();
            for(String s : arr){
                sb.append(s.charAt(0));
            }
            str = sb.toString().toUpperCase();

        }
    }
}
